It depends on how you use it. If an individual is using a cellphone for his/her entertainment even though the professor/teacher is having a lecture, then it is unethical. But if the individual is using his/her own phone for an emergency matter then it should be considered.
Native Americans in the United States fall into a number of distinct ethno-linguistic and territorial phyla, whose only uniting characeristic is that they were in a stage of either Mesolithic (hunter-gatherer) or Neolithic (subsistence farming) culture at the time of European contact.
They can be classified as belonging to a number of large cultural areas:
<span>Continental US</span>
Chief justice writes the court's opinion.
Chief justice presides also over the trial in the Senate. Also has a ceremonial duty of administering the oath of office of the President.
I am not 100% sure. But I do know the answer are not 2 and 3 are wrong. Hope that helps.